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We present the results of an extragalactic point source search using thefive-year WMAP 41, 61 and 94 GHz (Q-, V- and W-band) temperature maps. Thiswork is an extension of our point source search in the WMAP maps applying aCMB-free technique. An internal linear combination (ILC) map has been formedfrom the three-band maps, with the weights chosen to remove the CMB anisotropysignal as well as to favor a selection of flat-spectrum sources. We find 381sources at the > 5 sigma level outside the WMAP point source detection mask inthe ILC map, among which 89 are "new" (i.e., not present in the WMAP catalog).Source fluxes have been calculated and corrected for the Eddington bias. Wehave solidly identified 367 (96.3%) of our sources. The 1 sigma positionaluncertainty is estimated to be 2'. The 14 unidentified sources could be eitherextended radio structure or obscured by Galactic emission. We have also appliedthe same detection process on simulated maps and found 364+/-21 detections onaverage. The recovered source distribution N(>S) agrees well with thesimulation input, which proves the reliability of this method.

Extragalactic Point Source Search in Five-year WMAP 41, 61 and 94 GHz Maps